Surface relaxation behavior in cyclic polystyrene films

Yoshihisa Fujii; Kazuhiro Koguchi; Keiji Tanaka; Toshihiko Nagamura; Atsushi Takano; Yushu Matsushita; Tisato Kajiyama

Surface relaxation behavior in cyclic polystyrene films

Yoshihisa Fujii, Kazuhiro Koguchi, Keiji Tanaka, Toshihiko Nagamura, Atsushi Takano, Yushu Matsushita, Tisato Kajiyama

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Well-defined cyclic polystyrenes (c-PS) with various molecular masses were prepared by the reaction of linear polystyrene with two end vinyl groups and potassium naphthalenide as a coupling agent. Then, surface relaxation behavior in c-PS films was examined by lateral force microscopy (LFM). The α_a-relaxation process corresponding to the segmental motion was clearly observed at the surface in the c-PS films. Surface glass transition temperature so obtained was approximately 300 K, which was lower than the bulk value, and was independent of the molecular weight due to the absence of chain ends. The results indicate that the molecular motion at the polystyrene surface is activated by not only chain ends but also other factors.

Original language	English
Title of host publication	54th SPSJ Annual Meeting 2005 - Polymer Preprints, Japan
Pages	928
Number of pages	1
Volume	54
Edition	1
Publication status	Published - 2005
Event	54th SPSJ Annual Meeting 2005 - Yokohama, Japan Duration: May 25 2005 → May 27 2005

Other

Other	54th SPSJ Annual Meeting 2005
Country/Territory	Japan
City	Yokohama
Period	5/25/05 → 5/27/05

All Science Journal Classification (ASJC) codes

Engineering(all)

Cite this

@inproceedings{cd242f2ef6c849f688ad347ce972823b,

title = "Surface relaxation behavior in cyclic polystyrene films",

abstract = "Well-defined cyclic polystyrenes (c-PS) with various molecular masses were prepared by the reaction of linear polystyrene with two end vinyl groups and potassium naphthalenide as a coupling agent. Then, surface relaxation behavior in c-PS films was examined by lateral force microscopy (LFM). The αa-relaxation process corresponding to the segmental motion was clearly observed at the surface in the c-PS films. Surface glass transition temperature so obtained was approximately 300 K, which was lower than the bulk value, and was independent of the molecular weight due to the absence of chain ends. The results indicate that the molecular motion at the polystyrene surface is activated by not only chain ends but also other factors.",

author = "Yoshihisa Fujii and Kazuhiro Koguchi and Keiji Tanaka and Toshihiko Nagamura and Atsushi Takano and Yushu Matsushita and Tisato Kajiyama",

year = "2005",

language = "English",

volume = "54",

pages = "928",

booktitle = "54th SPSJ Annual Meeting 2005 - Polymer Preprints, Japan",

edition = "1",

note = "54th SPSJ Annual Meeting 2005 ; Conference date: 25-05-2005 Through 27-05-2005",

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TY - GEN

T1 - Surface relaxation behavior in cyclic polystyrene films

AU - Fujii, Yoshihisa

AU - Koguchi, Kazuhiro

AU - Tanaka, Keiji

AU - Nagamura, Toshihiko

AU - Takano, Atsushi

AU - Matsushita, Yushu

AU - Kajiyama, Tisato

PY - 2005

Y1 - 2005

N2 - Well-defined cyclic polystyrenes (c-PS) with various molecular masses were prepared by the reaction of linear polystyrene with two end vinyl groups and potassium naphthalenide as a coupling agent. Then, surface relaxation behavior in c-PS films was examined by lateral force microscopy (LFM). The αa-relaxation process corresponding to the segmental motion was clearly observed at the surface in the c-PS films. Surface glass transition temperature so obtained was approximately 300 K, which was lower than the bulk value, and was independent of the molecular weight due to the absence of chain ends. The results indicate that the molecular motion at the polystyrene surface is activated by not only chain ends but also other factors.

AB - Well-defined cyclic polystyrenes (c-PS) with various molecular masses were prepared by the reaction of linear polystyrene with two end vinyl groups and potassium naphthalenide as a coupling agent. Then, surface relaxation behavior in c-PS films was examined by lateral force microscopy (LFM). The αa-relaxation process corresponding to the segmental motion was clearly observed at the surface in the c-PS films. Surface glass transition temperature so obtained was approximately 300 K, which was lower than the bulk value, and was independent of the molecular weight due to the absence of chain ends. The results indicate that the molecular motion at the polystyrene surface is activated by not only chain ends but also other factors.

UR - http://www.scopus.com/inward/record.url?scp=33645639579&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645639579&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:33645639579

VL - 54

SP - 928

BT - 54th SPSJ Annual Meeting 2005 - Polymer Preprints, Japan

T2 - 54th SPSJ Annual Meeting 2005

Y2 - 25 May 2005 through 27 May 2005

ER -

Surface relaxation behavior in cyclic polystyrene films

Abstract

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